Improvement in the manufacture of pasteboard, composition boards, panels



W. P. ARNOLD. Improvement in the Manufacture of Pasteboard,Composition-Boards, Panels and other Articles from Reed. N0. 130,463.Patented Aug. 13,1872

WILLIAM P. ARNOLD, OF NEW YORK, N. Y.

IMPROVEMENT IN THE MANUFACTURE OF PASTEBGARD, COMPOSITIGN BOARDS,PANELS. AND OTHER ARTICLES FROM REED.

Specification forming part of Letters Patent No. 130,463, dated August13, 1872.

Be it known that I, WILLIAM P. ARNOLD, of the city of New York and Stateof New York, have invented a certain new and useful Process andMachinery for the Manufacture of Pasteboard, Composition Boards, andPanels, and other similar articles from the reedcane disintegrated bythe explosive force of steam and other fibrous substances, of which thefollowing is a specification, reference being had to the accompanyingdrawing, which will serve to illustrate more fully my invention.

To make pasteboard from the cane-fiber disintegrated as aforesaid it isbeaten up in a ragengine in the ordinary way and then run off upon awet-roll machine, thin paste or other adhesive liquid matter beingapplied, by the machinery hereinafter described, to the web as it ispassing around the wet roll. In this way the paste or other matter isinterposed between the sheets, which serves to fasten them together andgive the necessary tenacity, compactness, and hardness to thecane-fiber, which would otherwise be too soft and tender to make goodpasteboard or box-board by the wet-roll machinery. The manufacture iscompleted by dryin g and calendering, which may be done in the ordinaryway. The steam-blown cane-fiber prepared as aforesaid is speciallyadapted to this method of applying liquid paste or adhesive andstiffening and strengthening matter in a liquid form to the web runningaround a wet roll; but the same method may be applied with good effectto bamboo and other vegetable fibrous substances prepared for the samepurposes. Fire-proofing and water-proofing liquid compositions can beapplied in the same way to the web running around the wet roll to makefibrous boards and panels. The several webs forming the board or panelare thoroughly charged or covered with the fire-proofing orwater-proofing composition, and thus rendered fire-proof or water-proof,or both, as may be desired, and, the same being dried and passed throughcalender-rolls or otherwise subjected to a proper degree of pressure,will be available for building and other purposes.

The following is a description of the machinery for making the said newarticles of manufacture, reference being had to the drawing heretoannexed.

A is the roll upon which the continuous web is deposited after leavingthe endless felt at O.

13 represents the mold-vat of an ordinary paste box or trough It R R,rolls for supplying paste, 86G.

Instead of permitting layer upon layer of the web to form and felt oneupon the other, as is now the practice, I interpose coatings or layersof paste, mucilage, gum, glue, or other materials between eachsuccessive fibrous web or layer deposited upon the roll A. This may beeifeoted at any point of the roll A, either in the front, top, or rear,by means of two or inore rollers revolving in a bath, or being otherwisesupplied with paste, mucilage, gum, glue, &c., from a vessel orreservoir conveniently placed. I prefer the application of the paste,mucilage, glue, or other liquid or semiliquid to be made to the web atthe point I have named, because at the point Den the roll A the bulk ofthe water'has been gradually and efficiently expressed. If applied tothe surface of the continuous web at any point after it has left theforming-mold 0, it must be after it has been subjected to the action ofrollers to squeeze out the water. It is better, however, not to applythe paste, &c., before the final passage of the web onto the wet roll,

because much of the paste, glue, or other liq- I uid or semi-liquid iswasted by being expressed with the water in the pulp at the point wherethe rolls A and F come in contact. Two forming-molds may also be used,but I have found that a better material is made where one only is used.In front of the roll A, and parallel with it, I place a paste box ortrough, P, supported by standards or attached to the frame of themachine, or otherwise. This isv placed at a convenient elevation, and issupplied from a vessel or reservoir containing the liquid that it isintended to apply. In this box or trough P the roll R revolves. Uponthis roller lies another roller, R, and still upon this is anotherroller, B. These rollers are made of wood or other suitable material,and are evenly covered with woolen felt, rubber cloth, or other materialsuitable to take up and distribute the paste, &c., uniformly. Two rollsmay suffice, but I prefer the arrangement of three rolls, as describedin the drawing. The three rolls are driven by the friction imparted tothem by roll A, and run in contact with each other and synchronouslywith rolls A and F. If gearing or belting be used to drive the rolls R,R, and R, then, in order to prevent the breaking or disarrangement ofthe wet and tender web, such gearing or belting, in lieu of the frictionfrom roll A, must connect one or both of the rolls A and F (or a rollhaving precisely the same degree of speed as the rolls A and F) with theseries of rollers R, R, and It, so as to secure the synchronousmovement. The paste or other liquid, being first taken up on It, ispassed by means of'lt onto B. This latter roller is allowed to lean uponthe sheet as it is forming on roll A. The rollers so arranged secure aproper supply of the paste, 850., to the web without breaking ordisarranging such web, and the continuous sheet forming on the roll A isuniformly coated with the paste or other liquid and passes round theroll until it meets the web (as yet untouched with paste, 8w.) at thepoint K. This is allowed to continue until a board of the requiredweight is made. The upper roll R is so arranged that it may be thrownback and the supply of liquid stopped whenever it is found desirable. Astout iron rod running above and along the roll R will accomplish this;but this, in connection with a hand-lever properly arranged, ispreferable. Before the last web is run upon the roll the pasteroll,brought in contact with the web running on the wet roll, is withdrawn,so as to leave a clean outer web or covering, whereby the sheets areprevented from sticking to the cal ender-rolls.

By the use of the above method or process many liquids, or semi-liquidsother than paste or mucilage, 850., may be applied to the continuous weband deposited on the wet roll. For example, the various chlorides oroxides may be so applied, for the purpose of rendering paper boards,panels, &c., fire-proof or water-proof, or both.

Materials which, from their nature, would be unfit or ill adapted forthe manufacture of a merchantable board can by my process be convertedinto a board of a very superior quality. For example, the cane-fiberdisintegrated by Lymans steam-blowing process is somewhat too soft andtender (unless heavily treated with chemicals) to make a hard, compact,and tenacious board; but by the application of mucilaginous matter asabove all those defects are remedied, and a board of a Very superiorquality is obtained.

What I claim as new, and desire to secure by Letters Patent, is

1. The above-described method or process of manufacturing pasteboard,fibrous composition boards, and panels from the reed-cane disintegratedby the explosive force of steam and other fibrous substances, by applying paste, mucilage, gum, glue, and other materials to the web runningaround a wet roll, substantially as above described.

2. The improved articles of manufacture, consisting of pasteboard,fibrous composition boards, and panels, and other similar articles, madeby the process and method herein described.

WM. P. ARNOLD.

Witnesses:

THos. D. D. OURAND, CHAS. A. Pnrrrr.

